Steam-generator.



PATENTED JUNE 25,1907.

M. CONNOR.

STEAM GENERATOR. APPLICATIQN FILED SEPT. 1, 1906i 5 SHEETS-SHEET 1.

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-No. 857.723. I

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STEAM GENERATOR APPLICATION FILED snrrl 1, 1906.

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No. 857,723. PAHTELNTED JUNE 25, 1907,

I M. CONNOR.

STEAM GENERATOR. APPLICATION FILED $EPT.1, 1906.

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PATENTBD JUNE 25, 1907.

' M. CONNOR;

STEAM GENERATOR.

APPLIQATION FILED SEPT. 1, 1906.

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UNITED STATES PATENT orrrcn. V

STEAM -GENERATOR.

Specification of Letters Patent.

Patented June 25, 1907-.

Application filed September 1, 1906. Serial No. 332,985.

1 0 Ml whom it may concern.-

Be it known that I, MILEs CONNOR, a citizen of the United States,residing at Pueblo, in the county of Pueblo and State of Colorado, haveinvented certain new and useful Improvements in Steam-Generators; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as 'will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to new and useful improvements in steam generatorsand more particularly to that class adapted to be used in connectionwith upright boilers such as are employed in use upon fire engines andmy object is to provide means for quickly generating steam therein.

A further object is to provide means for directing the water from thatportion of the boiler immediately around the fire box through and abovethe fire box into the upper end of the boiler.

A still further object is to provide means for automatically directingthe water through the tubes and the water acket thereby insuring acontinuous and complete circulation.

Other objects and advantageswill be hereinafter referred to and moreparticularly pointed out in the claims.

In the accompanying drawings which are made a part of this application,Figure 1 is a side elevation of a boiler employing my improvedcirculation generating mechanism showing portions thereof in dottedlines. Fig. 2 is a central sectional view through the boiler showing thewater tubes and a portion of my improved generatingmechanism disposedtherein. Fig. 3 is a plan view of the boiler and parts secured theretowith a the hood of the boiler removed. Fig. t'is a bottom plan view ofthe boiler showing parts of my improved generator secured thereto. Fig.5 is a detail sectional View on an enlarged scale of my improvedcirculating valve, and, Figs. 6 to 13, inclusive, are views showingmodified forms of the generator proper.

Referring to the drawings in which similar reference numerals designatecorresponding parts throughout the several views, 1 indicates the shellor outer casing of a boiler such as is commonly used in connection withfire engines within which is disposed and at a dis tance therefrom aninner shell 2, said shells being secured together at their upper andlower ends to form a water and steam jacket or space 3.

' Extending through the boiler near its lower end is an opening 4through which fuel is inserted into the fire box 5, the upper end of theboiler being provided with a hood 6, to the upper end of which issecured the usual form of draft pipe 7.

It is well known in the art that vertically disposed tubes have the bestcirculating but poor generating qualities, while the horizontallydisposed tubes are the best generators but have poor circulatingqualities and to this end I employ a plurality of horizontally disposedwater tubes 8 which extend in substantially helical form from a pointabove the fire box 5 to the upper end of the inner shell 2 where theyare connected with the steam space 3 by disposing the upper free ends 9of the tubes through the wall of the shell 2 and by so disposing thetubes 8, the generating qualities thereof will be increased.

To obtain the proper circulation through the horizontally disposed tubes8 I provide a vertically disposed generator proper 10 which ispreferably composed of a plurality of vertically disposed pipes 11provided at their lower ends with a connecting head 12 and at theirupper ends with a similar head 13. Water is introduced into thegenerator 10 through a pipe 14, said pipe communicating with any sourceof water supply and has one of its ends disposed through the boiler andinto connection with the head 12 at the lower end of the pipes 11, thewater passing through the pipes 11 into the head 13 from whence it isconveyed into a pipe 15 extending over the top of the boiler, the lowerend of the pipe 15 having a nozzle 15 at its lower end which is directedinto engagement with a circulating valve 16, said valve being providedwith a longitudinal bore 17 which is restricted in size near its center,thereby compressing the flow of water therethrough to form a vacuum.

Secured to the opposite end of the circulating valve 16 is a leadingpipe 18 which is directed through the walls of the boiler and intoengagement with the plurality of tubes 8. The valve 16 is connected tothe lower end of the water space 3 by means of a connecting pipe 19,said pipe being provided near its junction with the water jacket with avalve 20 while the upper end of the connecting pipe is directed into thecirculating valve 16 around the nozzle 15 so that when steam or water isdirected through the nozzle the valve 16 will act as an injector or jetpump to draw the water through the pipe 19.

As best shown in Figs. 3 and 4 of the drawing, the generator 10 ispreferably placed within the boiler immediately over the combustionchamber, so that the pipes 11 will be in direct contact with the heatarising from the fire box thereby quickly heating the water in thegenerator and as the volume of water within the generator is so muchless than in the tubes 8 or water space 3, steam will first be producedin the generator after which it is discharged through the ipe 15 andinto the circulating valve, therey causing a vacuum in the connectingpipe 19 which will result in drawing the water from the jacket 3 at apoint immediately around the fire box and directing the same through thepipe 18 into the tubes 8 from whence it is conveyed to the upper end ofthe boiler and directed into the steam space through the ends 9 therebyproducing a forced circulation through the tubes and jacket. It will beclearly seen that by this construction the water can be very quicklyheated as the water in the boiler immediately around the fire box willbe heated quicker than the water in the upper end of the boiler as theheat is more intense at this point and by causing a forced circulationthe water will be drawn from the water jacket at a point immediatelyaround the fire box and directed into the steam space at the upper endof the boiler through the pipes 8, this operation taking the heatedwater from the lower end of the jacket and disposing it into the upperend thereof bringing the cooler water to the lower end of the waterjacket and disposing it around the fire box.

The feed pipe 14 is provided with a check valve 23 near its intersectionwith the boiler so that at any time the supply of water may be entirelyshut ofi from the generator 10 and the pipe 22 is also provided with asuitable valve 24 so that the water may be cut off from the connectingpipe 19 and likewise the valve in the connecting pipe 19 serves to cutoff the water between the water jacket and circulating valve. The waterin entering the boiler is first directed through the generator 10through the pipes 15 and 18, the tubes 8, and into the space 3, thepressure of the water in the pipe 14 being sufiicient to force the waterthrough the generator and tubes 8 and it may be readily ascertained whena sufficient amount of water has entered the boiler by means, of a gageglass 25, a similar gage glass 26 being secured to the generator 10while the boiler is also provided with suitable test cocks 27. When itbecomes necessary to replenish the boiler and generator with water, thevalve 23 is opened and the water directed first into the generreachesthe lower ends of the tubes 8 and is thoroughly heated when it reachesthe water space in the boiler. By this construction it will be seen thatthe steam pressure in the boiler will not be decreased by the introduction of a new supply of water, and it will also be seen that theintroduction of the new supply of water will cause the continuation ofthe circulation through the tubes and boiler. As soon as the boiler hasbeen sufficiently filled, the valve 23 is again closed and as soon asthe water in the generator has become sufficiently heated, the steamarising therefrom will again start the circulation through the boilerand tubes.

I/Vhile I have shown the generator 10 as' preferably constructed ofpipes as shown in Figs. 1, 2 and 3, I desire it to be understood thatthe generator may be formed in various ways without materially reducingits heating qualities, the various forms being shown in Figs. 6 to 13,inclusive, the generator shown in Fig. 6 being constructed by disposingangle irons 28 vertically between the outer and inner shells 1 and 2,and riveting the same in position.

In Fig. 7 the inner wall 2 is provided with an off set 29 and thegenerator 10 seated in the offset. In Fig. 8, the generator is formed bydirecting a portion of the inner shell inwardly and disposing a stripover the inwardly directed portion of the shell 2. In Fig. 9 of thedrawing the generator is composed of a single straight pipe having ahead at the top and bottom thereof and a smaller pipe spirally disposedfrom the lower to the upper head. In Figs. 10 and 11 the generator isformed from a single strip of sheet metal, the same being bent uponitself and the edges secured together as by riveting, the body portionof the sheet being bulged out to form a receptacle for the water, whilein Figs. 12 and 13 the generator is formed of pipes having a head at thetop and bottom thereof, one edge of said heads being substantiallyV-shaped to receive an extra pipe, the object in providing an extra pipebeing to cause a circulation between the two heads of the generator,this result being accomplished by disposing the extra pipe adj acent thewall of the inner shell and between the shell and the other tubesthereby shielding the extra tube from the intense heat, the result beingthat the water will become heated more rapidly in the outer pipes andwill arise,

culation of the water through the water jacket and tubes 8 before thewater in the generator 10 is sufiiciently heated to cause a forcedcirculation and to that end I provide a pump 21 which may be of the wellknown or any preferred construction and preferably manually operated,the pump being in communication with the water jacket 3 and connectingpipe 19 through the medium of a pipe 22, one end of which is directedthrough the outer shell 1 and the opposite end thereof disposed intoconnection with the connecting pipe 19 so that when the pump is operatedthe water will be forced through the connectingpipe 19 into thecirculating valve 16 and thence through the pipeslS into the tubes 8,the pipe 22 being directed through the shell 1 in line with the pipe 19thereby directing the water from bottom to top of the boiler shellthrough tubes 8.

While I have shown the tubes 8 as entering the extreme upper end of theboiler, I desire it to be understood that the ends 9 may be introducedthrough the side of the shell 2 to prevent the water from being carriedover with the steam through the steam supply pipe or takeoff, and itwill also be understood that the pipes 8 may be disposed within theboiler in any preferred manner without departing from the scope of myinvention.

I/Vhat I claim is:

1. A boiler of the class described, a steam generator disposed thereincomprising a series of horizontally disposed tubes, means to connectsaid generator with the upper portion of said boiler, in combinationwith a vertically disposed steam generator, a circulating valve, meansto connect the circulating valve and the upper portion of said verticalgenerator, and additional means to connect the inlet and ejecting endsof the circulating valve with the lower portions of the boiler andhorizontal generating tubes respectively.

2. In a steam generator of the class described, the combination with aboiler having a water and steam space therein, and a plurality ofhorizontally disposed tubes in said boiler connected with the upper endof the steam space; of a generator in saidboiler comprising an upper anda lower head and vertically disposed generating tubes connecting saidheads, means to direct water into the lower head, a pipe extendingdownwardly from said upper head, a circulating valve connected to saidpipe, a pipe connecting the circulating valve with the boiler, andadditional -means connecting the circulating valve and

